Does a 10 mm upper exist?

[Hallboss]

I have searched with no results for a 10 mm upper and only found negative feedback on .40 ca uppers.

Is there a company that makes a 10 mm upper or if not, a reliable .40 ca upper.

I want one of these two rounds out of preference, I don't really care for the 9mm. Even though the only thing I will ever shoot at is paper targets during some 'tacticool' fantasies or the errant squirrel.

Thanks guys

[dewatters]

FWIW: Olympic used to make a 10x25mm upper. The original model was even gas operated. I can't vouch for their quality though.

[Abraxas]

Why the interest in 10 mm uppers?

[miserai]

we got one in the store that i work for, its a real early olympic, its kinda wierd. it has a pistol length gas system. none of us has ever messed with it, we got it at one of the auctions around here.

[Hallboss]

Why the interest in 10 mm uppers?

Just preference, if there was a .44 mag or a .357 mag, I would probably prefer that...It pretty much boils down to I do not want a 9mm. Once again it is preference...I don't like 9 mm.

[Hallboss]

FWIW: Olympic used to make a 10x25mm upper. The original model was even gas operated. I can't vouch for their quality though.

From what I have heard, Olympic does not have a good rep with their uppers.

[lindertw]

Just preference, if there was a .44 mag or a .357 mag, I would probably prefer that...It pretty much boils down to I do not want a 9mm. Once again it is preference...I don't like 9 mm.

this may be of interest to you...

[No.6]

I've been toying with the idea of a 10mm upper myself. Doesn't seem to be many companies or custom makers out there that are willing to work on something that may or may not sell to a large number of folks. Can't really blame them considering the time and effort that would have to be expended vs. the potential return. Probably the best bet will be a home-brewed one....

[Hallboss]

I've been toying with the idea of a 10mm upper myself. Doesn't seem to be many companies or custom makers out there that are willing to work on something that may or may not sell to a large number of folks. Can't really blame them considering the time and effort that would have to be expended vs. the potential return. Probably the best bet will be a home-brewed one....

Oly does make a 10 mm upper that uses a modified uzi mag., but I have heard mixed reviews with Oly on their pistol uppers. I've heard the 9 mm works great, but the .40 ca has feeding problems. I can't find anything about the 10 mm reliabilty.

[khc3]

Oly does make a 10 mm upper that uses a modified uzi mag., but I have heard mixed reviews with Oly on their pistol uppers. I've heard the 9 mm works great, but the .40 ca has feeding problems. I can't find anything about the 10 mm reliabilty.

I had a Oly 10mm upper, and it worked very well with M3 mags and a Cav Arms MKII lower.